LinuxQuestions.org

LinuxQuestions.org (/questions/)
-   Linux - Server (https://www.linuxquestions.org/questions/linux-server-73/)
-   -   Interesting cron happenings (https://www.linuxquestions.org/questions/linux-server-73/interesting-cron-happenings-614240/)

vonedaddy 01-17-2008 06:56 AM
Interesting cron happenings
 
I have an ftp server so fellow members of my design group can share large files.. Anyway I like to keep tabs on everything so I created a cron job to send me some logs every morning. My crontab file looks like this:


[root@bighat ftptools]# crontab -l
10 * * * * /root/ftptools/set_ogp.sh
* 6 * * * /root/ftptools/send_logs.sh
[root@bighat ftptools]#


The first cron job sets permissions on my ftp files so everyone will have access to everyone elses files, works great.

Second crontab is called send_logs.sh and that basically sends me an email using sendmail and places the last 400 lines of each log into the emails. Here is what that file looks like:

[root@bighat ftptools]# cat send_logs.sh
tail -400 /var/log/xferlog | /usr/sbin/sendmail -f xferlog savone@aivila.net
tail -400 /var/log/secure | /usr/sbin/sendmail -f xferlog savone@aivila.net


So when I run that file manually I get 2 nice emails with what I would expect to get in them. When it runs via cron I get 120+ emails, basically 60 duplicates of each email.

Since its set to run at 6am I figured I would show you the cron log:


Jan 17 05:01:01 bighat CROND[25632]: (root) CMD (run-parts /etc/cron.hourly)
Jan 17 05:10:01 bighat CROND[25635]: (root) CMD (/root/ftptools/set_ogp.sh)
Jan 17 06:00:01 bighat CROND[25773]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:01:01 bighat CROND[25788]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:01:01 bighat CROND[25789]: (root) CMD (run-parts /etc/cron.hourly)
Jan 17 06:02:01 bighat CROND[25802]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:03:01 bighat CROND[25815]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:04:01 bighat CROND[25828]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:05:01 bighat CROND[25841]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:06:01 bighat CROND[25854]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:07:01 bighat CROND[25867]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:08:01 bighat CROND[25880]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:09:01 bighat CROND[25893]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:10:01 bighat CROND[25908]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:10:01 bighat CROND[25909]: (root) CMD (/root/ftptools/set_ogp.sh)
Jan 17 06:11:01 bighat CROND[25930]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:12:01 bighat CROND[25943]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:13:01 bighat CROND[25956]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:14:01 bighat CROND[25969]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:15:01 bighat CROND[25982]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:16:01 bighat CROND[25995]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:17:01 bighat CROND[26008]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:18:01 bighat CROND[26021]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:19:01 bighat CROND[26034]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:20:01 bighat CROND[26047]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:21:01 bighat CROND[26060]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:22:01 bighat CROND[26073]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:23:01 bighat CROND[26103]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:24:01 bighat CROND[26116]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:25:01 bighat CROND[26129]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:26:01 bighat CROND[26142]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:27:01 bighat CROND[26173]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:28:01 bighat CROND[26295]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:29:01 bighat CROND[26308]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:30:01 bighat CROND[26321]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:31:01 bighat CROND[26334]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:32:01 bighat CROND[26347]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:33:01 bighat CROND[26360]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:34:01 bighat CROND[26373]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:35:01 bighat CROND[26386]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:36:01 bighat CROND[26399]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:37:01 bighat CROND[26412]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:38:01 bighat CROND[26425]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:39:01 bighat CROND[26438]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:40:01 bighat CROND[26451]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:41:02 bighat CROND[26464]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:42:01 bighat CROND[26477]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:43:01 bighat CROND[26490]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:44:01 bighat CROND[26503]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:45:01 bighat CROND[26516]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:46:01 bighat CROND[26529]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:47:01 bighat CROND[26542]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:48:01 bighat CROND[26555]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:49:01 bighat CROND[26568]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:50:01 bighat CROND[26581]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:51:01 bighat CROND[26594]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:52:01 bighat CROND[26607]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:53:01 bighat CROND[26620]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:54:01 bighat CROND[26633]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:55:01 bighat CROND[26646]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:56:01 bighat CROND[26659]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:57:01 bighat CROND[26672]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:58:01 bighat CROND[26685]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 06:59:01 bighat CROND[26698]: (root) CMD (/root/ftptools/send_logs.sh)
Jan 17 07:01:01 bighat CROND[26711]: (root) CMD (run-parts /etc/cron.hourly)
Jan 17 07:10:01 bighat CROND[26714]: (root) CMD (/root/ftptools/set_ogp.sh)
Jan 17 07:28:09 bighat crontab[26911]: (root) LIST (root)
Jan 17 07:47:29 bighat crontab[26917]: (root) LIST (root)





Does anyone have any ideas why it would repeat itself 60 times?

colucix 01-17-2008 07:05 AM
Because it runs every minute from 6:00 to 6:59. The crontab entry should be:
Code:
0 6 * * * /root/ftptools/send_logs.sh
;)

vonedaddy 01-17-2008 07:25 AM
Quote:
Originally Posted by colucix (Post 3025729)
Because it runs every minute from 6:00 to 6:59. The crontab entry should be:
Code:
0 6 * * * /root/ftptools/send_logs.sh
;)
Thats why I love this place, thanks a million that would explain it perfectly!

colucix 01-17-2008 07:47 AM
He he... you're welcome! :)


All times are GMT -5. The time now is 12:38 AM.